Metal can-body or composite blank therefor.



E. NORTON.

METAL GAN BODY 0E COMPOSITE BLANK THEREFOR.

APPLICATION FILED MAY 9, 1912.

1,1 14,508. Patentd 001;. 20, 1914.

EDWIN NORTON, OF HAMILTON, BERMUDA.

METAL CAN-BODY 0R COMPOSITE BLANK THEREFOR.

Specification of Letters Patent.

Patented Oct. 20, 19114..

Application filed May 9, 1912. Serial No. 696,180.

To all whom. it may concern:

Be it known that I, EDWIN NORTON, a citizen of the United States, residing at Hamilton, in Bermuda, have invented certain new and useful Improvements in Metal Can-Bodies or Composite Blanks Therefor, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in metal can bodies or the composite blanks for forming the same, and more especially-t0 a can body which is constructed with a lap seam.

It is desirable to provide the inner surface of a can body with a coating of lacquer, aluminum or other resisting material which is not acted upon by the acids or other attacking ingredients contained in the contents of the can. Where the inner surface the can body is lacquered prior to the soldering of the side scam, the heat applied to the solder in forming the side seam, discolors the lacquer or coating on the inner face of the can body, and produces a can body which is objectionable in appearance.

An object of the present invention is to construct the can body, and the blank forming the same, so that when the side seam is soldered, the inner lacquered surface adjacent the side seam is protected from the heat, so that the lacquer will not be dis colored.

In the drawings, Figure 1 is asectional view through a can body having my im provement applied. thereto; Fig. 2 is a plan view of the inner surface of a composite blank usedin forming my improved can body; Fig. 3 is a view of one edge of the blank from the opposite side thereof; Fig. 4 is an edge view of the blank; and Fig. 5 is a sectional view through the can body, showing the construction at the lap seam.

In carrying out the invention, the blank which is to form the can body is preferably provided with solder strips, which are so disposed upon the blank that when the blank is brought into position for the side seam, the solder strips will be disposed one upon the other. The blank is further provided with a part which projects beyond the solder strip at one end of the blank, which projecting part is adapted to be folded back on the inner face of the blank, so that the inner exposed face of the can body at the shaped so (which is the inner face of the folded back portion) is so far removed from the point where the solder secures the overlapped parts of the blank, that the heat will not injure the lacquer or coating on the inner face of said folded back portion, and consequently the inner lacquered surface of the can body will not be discolored.

Referring more in detail to the drawing, my improved composite can body blank 1 is that the same may be formed into a can body. Said blank adjacent the edge 2 is formed with a solder strip 3 which extends entirely across adjacent the other side scam,

in Fig. 2, and also with a solder strip 6 on the other face, as viewed in Fig. 3. The solder strips 5 and 6 when subjected-to heat melt and connectthe edges of the blank forming the side seam for the can body.

The blank, except for the parts where the solder strips are applied, is provided with a resisting coating of lacquer, aluminum or any other suitable material. This coating may be applied to both sides of the blank, if desired, and will at least be applied to both sides of the part of the blank 7 which projects beyond the solder strip 3.

In the forming of the can body, the projecting portion 7 is folded back on to the blank, as shown in Fig. 4, so that the edge of the fold .8 is adjacent the edge of the solder strip 3. The blank is then curved, so that the edge 4 overlaps the edge of the fold 8 at the other side of the blank, and the inwardly folded portion 7 is on the inside of the can body. This inwardly projecting portion 7 is of sufficient width, so as to eX- tend slightly beyond the edge 4. When the heat is applied to the lap seam, so as to join the lapped edges, the inwardly folded part 7 is a sufficient distance from said point of application of the heat so that the inner surface of said folded part will not be sufliciently heated to discolor the lacquer. As a consequence, when the body is formed from my improved blank, the inner lacquered surface of the body will not be in any way discolored.

It is obvious that minor changes in the details of construction and the arrangement of parts may be made, without departing from the spirit of the invention.

It is also obvious that while I have described the use of a solder strip' for uniting the blank. Said blank edge 4 is formed with. a solder strip'5 on the front face, as viewed the overlapped edges, that I have used this term in its broader sense, and that pure tin, or any other similar material is intended to be covered thereby.

Having thus I claim as new and desire to secure by Lettcrs Patent, is

A can body comprising a metal sheet having on the inner surface thereof a resisting coating, the outer side edge of said sheet overlapping the inner side edge thereof and connected thereto by solder, said inner side described my invention, what 

